diff --git a/packages/backend/src/core/HttpRequestService.ts b/packages/backend/src/core/HttpRequestService.ts
index 0ad5667049ab..083153940a65 100644
--- a/packages/backend/src/core/HttpRequestService.ts
+++ b/packages/backend/src/core/HttpRequestService.ts
@@ -54,19 +54,19 @@ class HttpRequestServiceAgent extends http.Agent {
 				}
 			});
 		return socket;
-	};
+	}
 
 	@bindThis
 	private isPrivateIp(ip: string): boolean {
 		const parsedIp = ipaddr.parse(ip);
-	
+
 		for (const net of this.config.allowedPrivateNetworks ?? []) {
 			const cidr = ipaddr.parseCIDR(net);
 			if (cidr[0].kind() === parsedIp.kind() && parsedIp.match(ipaddr.parseCIDR(net))) {
 				return false;
 			}
 		}
-	
+
 		return parsedIp.range() !== 'unicast';
 	}
 }
@@ -93,19 +93,19 @@ class HttpsRequestServiceAgent extends https.Agent {
 				}
 			});
 		return socket;
-	};
+	}
 
 	@bindThis
 	private isPrivateIp(ip: string): boolean {
 		const parsedIp = ipaddr.parse(ip);
-	
+
 		for (const net of this.config.allowedPrivateNetworks ?? []) {
 			const cidr = ipaddr.parseCIDR(net);
 			if (cidr[0].kind() === parsedIp.kind() && parsedIp.match(ipaddr.parseCIDR(net))) {
 				return false;
 			}
 		}
-	
+
 		return parsedIp.range() !== 'unicast';
 	}
 }
diff --git a/packages/backend/src/core/RemoteUserResolveService.ts b/packages/backend/src/core/RemoteUserResolveService.ts
index 678da0cfa62d..098b5e170618 100644
--- a/packages/backend/src/core/RemoteUserResolveService.ts
+++ b/packages/backend/src/core/RemoteUserResolveService.ts
@@ -54,7 +54,7 @@ export class RemoteUserResolveService {
 			}) as MiLocalUser;
 		}
 
-		host = this.utilityService.punyHost(host);
+		host = this.utilityService.toPuny(host);
 
 		if (host === this.utilityService.toPuny(this.config.host)) {
 			this.logger.info(`return local user: ${usernameLower}`);
diff --git a/packages/backend/src/core/activitypub/models/ApPersonService.ts b/packages/backend/src/core/activitypub/models/ApPersonService.ts
index 71980c9b01ab..c95d3307ce40 100644
--- a/packages/backend/src/core/activitypub/models/ApPersonService.ts
+++ b/packages/backend/src/core/activitypub/models/ApPersonService.ts
@@ -165,13 +165,16 @@ export class ApPersonService implements OnModuleInit {
 		}
 
 		for (const collection of ['outbox', 'followers', 'following'] as (keyof APTypes.IActor)[]) {
-			const collectionUri = APTypes.getApId(x[collection]);
-			if (typeof collectionUri === 'string' && collectionUri.length > 0) {
-				if (this.utilityService.punyHost(collectionUri) !== expectHost) {
-					throw new Error(`invalid Actor: ${collection} has different host`);
+			const xCollection = (x as APTypes.IActor)[collection];
+			if (xCollection != null) {
+				const collectionUri = APTypes.getApId(xCollection);
+				if (typeof collectionUri === 'string' && collectionUri.length > 0) {
+					if (this.utilityService.punyHost(collectionUri) !== expectHost) {
+						throw new Error(`invalid Actor: ${collection} has different host`);
+					}
+				} else if (collectionUri != null) {
+					throw new Error(`invalid Actor: wrong ${collection}`);
 				}
-			} else if (collectionUri != null) {
-				throw new Error(`invalid Actor: wrong ${collection}`);
 			}
 		}
 
diff --git a/packages/backend/test-federation/.config/example.default.yml b/packages/backend/test-federation/.config/example.default.yml
index ff1760a5a65b..28d51ac86eec 100644
--- a/packages/backend/test-federation/.config/example.default.yml
+++ b/packages/backend/test-federation/.config/example.default.yml
@@ -19,7 +19,6 @@ proxyBypassHosts:
   - challenges.cloudflare.com
 proxyRemoteFiles: true
 signToActivityPubGet: true
-allowedPrivateNetworks: [
-  '127.0.0.1/32',
-  '172.20.0.0/16'
-]
+allowedPrivateNetworks:
+  - 127.0.0.1/32
+  - 172.20.0.0/16
diff --git a/packages/backend/test/unit/activitypub.ts b/packages/backend/test/unit/activitypub.ts
index 0ab062cd3bd9..7691dbf61219 100644
--- a/packages/backend/test/unit/activitypub.ts
+++ b/packages/backend/test/unit/activitypub.ts
@@ -176,7 +176,7 @@ describe('ActivityPub', () => {
 			resolver.register(actor.id, actor);
 			resolver.register(post.id, post);
 
-			const note = await noteService.createNote(post.id, resolver, true);
+			const note = await noteService.createNote(post.id, undefined, resolver, true);
 
 			assert.deepStrictEqual(note?.uri, post.id);
 			assert.deepStrictEqual(note.visibility, 'public');
@@ -336,7 +336,7 @@ describe('ActivityPub', () => {
 			resolver.register(actor.featured, featured);
 			resolver.register(firstNote.id, firstNote);
 
-			const note = await noteService.createNote(firstNote.id as string, resolver);
+			const note = await noteService.createNote(firstNote.id as string, undefined, resolver);
 			assert.strictEqual(note?.uri, firstNote.id);
 		});
 	});